如何从Apple开发者帐户中删除密钥？

Question

I have been trying to set up Firebase cloud messaging with APN using the p.8 file you download from developer.apple.com, but I have not been successful.
Firebase p8: Invalid APN Certificate. Check the certificate in Settings

Others here on SO, suggested I should create a new key in developer.apple.com account. I created 2 keys, nothing works.
Now if I try to create a new key, i get error:

You have already reached the maximum allowed number of Keys for this service

If you go to https://developer.apple.com/account/ios/authkey/ , there is a + button to add a new key, but there is no way to delete/revoke a key once create.
I don't see any control that would enable one to perform such action.

Answer 1

If you are admin of this account then click on key you will see this option like attached screenshot.